As a whole, I really enjoyed Twist.  Everyone in the cast was capable of their role, and I felt that the lead roles were fantastic.  The actress who played Della was fantastic -- great singer, dancer, and actress with a great stage presence.  My favorite actor, while he played my least favorite literary character, was Lucius.  He was a good singer and a better actor, proving this to the audience who he was able to convince his evilness so well that he was "booed" at the curtain call.  Twist himself was a perfect fit, too, his sometimes squeaky voice very charming and innocent.  If I had to improve anything, I might make it move a bit faster.  It seemed to drag on for a long time, especially in the middle of the play.  Perhaps they would speed up the tempo of some songs, making it move a bit quiver.  Also, the ensemble seemed to be too small at times, and many of them also held the role of other characters.  The bigger the ensemble, the bigger the sound and effect of their dancing.  Overall, I fine it very hard to criticize this play, because it was so good.